Question 1

When a histogram is positively skewed,it ________.

Accepted Answer

A) tails off to the right 
B) is symmetrical 
C) tails off to the left 
D) has a slope greater than one 
A) tails off to the right 
B) is symmetrical 
C) tails off to the left 
D) has a slope greater than one A

Question 2

________ is a measure of a linear relationship between two variables.

Accepted Answer

A) Variance 
B) Proportion 
C) Correlation 
D) Kurtosis 
A) Variance 
B) Proportion 
C) Correlation 
D) Kurtosis C

Question 3

Computing the difference between the maximum value and the minimum value gives the ________ of the data set.

Accepted Answer

A) variance 
B) standard deviation 
C) range 
D) median 
A) variance 
B) standard deviation 
C) range 
D) median C

Question 4

Statistics such as means and variances are not appropriate for categorical data.

Accepted Answer

A) True 
 B)False

Question 5

List three statistical measures that characterize dispersion.

Accepted Answer

Range is the difference between the maxi

Question 6

According to the empirical rules,approximately 38% of the observations will fall within two standard deviations of the mean.

Accepted Answer

A) True 
 B)False

Question 7

________ is the quartile representing the 50th percentile.

Accepted Answer

A) Q1 
B) Q2 
C) Q3 
D) Q4 
A) Q1 
B) Q2 
C) Q3 
D) Q4

Question 8

The midrange for a data set containing all the values between 50 and 67 is ________.

Accepted Answer

A) 67 
B) 58.5 
C) 50 
D) -17 
A) 67 
B) 58.5 
C) 50 
D) -17

Question 9

Which of the following is true of outliers in a data set?

Accepted Answer

A) All outliers should be eliminated in order to portray accurate information. 
B) Outliers that are within 1 standard deviation of the mean must be eliminated. 
C) The mean and range are sensitive to outliers in the data. 
D) Outliers do not make any difference in the results obtained from statistical analyses. 
A) All outliers should be eliminated in order to portray accurate information. 
B) Outliers that are within 1 standard deviation of the mean must be eliminated. 
C) The mean and range are sensitive to outliers in the data. 
D) Outliers do not make any difference in the results obtained from statistical analyses.

Question 10

The ________ is a value at or below which at least k percent of the observations lie.

Accepted Answer

A) kth percentile 
B) kth ratio 
C) kth quartile 
D) kth mean 
A) kth percentile 
B) kth ratio 
C) kth quartile 
D) kth mean

Question 11

Which of the following coefficients of skewness values has the lowest degree of skewness?

Accepted Answer

A) 1 
B) 1.1 
C) 0.5 
D) 0.05 
A) 1 
B) 1.1 
C) 0.5 
D) 0.05

Question 12

An observation that is radically different from the rest is called ________.

Accepted Answer

A) the median 
B) the mean 
C) an outlier 
D) the mode 
A) the median 
B) the mean 
C) an outlier 
D) the mode

Question 13

Pivot tables can be used to create ________.

Accepted Answer

A) dot-scale diagrams. 
B) box-and-whisker plots. 
C) cross-tabulations for categorical data. 
D) scatter plots. 
A) dot-scale diagrams. 
B) box-and-whisker plots. 
C) cross-tabulations for categorical data. 
D) scatter plots.

Question 14

All of the following are examples of measures of central tendency except ________.

Accepted Answer

A) mean 
B) median 
C) standard deviation 
D) mode 
A) mean 
B) median 
C) standard deviation 
D) mode

Question 15

Box plots and dot-scale diagrams can help identify possible outliers visually.

Accepted Answer

A) True 
 B)False

Question 16

What does a negative correlation coefficient indicate?

Accepted Answer

A) When one variable increases,the other variable decreases. 
B) There is a nonlinear relationship between the two variables. 
C) When one variable increases,the other variable increases by a smaller proportion. 
D) A change in one variable does not lead to a change in the other variable. 
A) When one variable increases,the other variable decreases. 
B) There is a nonlinear relationship between the two variables. 
C) When one variable increases,the other variable increases by a smaller proportion. 
D) A change in one variable does not lead to a change in the other variable.

Question 17

Point estimates that accurately represent population parameters are called outliers.

Accepted Answer

A) True 
 B)False

Question 18

________ is the quartile representing the 100th percentile.

Accepted Answer

A) Q1 
B) Q2 
C) Q3 
D) Q4 
A) Q1 
B) Q2 
C) Q3 
D) Q4

Question 19

Three-fourths of the data fall below the ________ quartile.

Accepted Answer

A) fourth 
B) second 
C) first 
D) third 
A) fourth 
B) second 
C) first 
D) third

Question 20

A table that shows the number of observations in each of several nonoverlapping groups is called a ________.

Accepted Answer

A) frequency distribution 
B) scatter plot 
C) histogram 
D) chart 
A) frequency distribution 
B) scatter plot 
C) histogram 
D) chart

When a histogram is positively skewed,it ________.

________ is a measure of a linear relationship between two variables.

Computing the difference between the maximum value and the minimum value gives the ________ of the data set.

Statistics such as means and variances are not appropriate for categorical data.

List three statistical measures that characterize dispersion.

According to the empirical rules,approximately 38% of the observations will fall within two standard deviations of the mean.

________ is the quartile representing the 50^th percentile.

The midrange for a data set containing all the values between 50 and 67 is ________.

Which of the following is true of outliers in a data set?

The ________ is a value at or below which at least k percent of the observations lie.

Which of the following coefficients of skewness values has the lowest degree of skewness?

An observation that is radically different from the rest is called ________.

Pivot tables can be used to create ________.

All of the following are examples of measures of central tendency except ________.

Box plots and dot-scale diagrams can help identify possible outliers visually.

What does a negative correlation coefficient indicate?

Point estimates that accurately represent population parameters are called outliers.

________ is the quartile representing the 100^th percentile.

Three-fourths of the data fall below the ________ quartile.

A table that shows the number of observations in each of several nonoverlapping groups is called a ________.

Data and Business Decisions

Probability Concepts and Distributions

Sampling and Estimation

Hypothesis Testing and Statistical Inference

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Queues and Process Simulation Modeling

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

Filters

Exam 2: Descriptive Statistics and Data Analysis

When a histogram is positively skewed,it ________.

________ is a measure of a linear relationship between two variables.

Computing the difference between the maximum value and the minimum value gives the ________ of the data set.

Statistics such as means and variances are not appropriate for categorical data.

List three statistical measures that characterize dispersion.

According to the empirical rules,approximately 38% of the observations will fall within two standard deviations of the mean.

________ is the quartile representing the 50th percentile.

The midrange for a data set containing all the values between 50 and 67 is ________.

Which of the following is true of outliers in a data set?

The ________ is a value at or below which at least k percent of the observations lie.

Which of the following coefficients of skewness values has the lowest degree of skewness?

An observation that is radically different from the rest is called ________.

Pivot tables can be used to create ________.

All of the following are examples of measures of central tendency except ________.

Box plots and dot-scale diagrams can help identify possible outliers visually.

What does a negative correlation coefficient indicate?

Point estimates that accurately represent population parameters are called outliers.

________ is the quartile representing the 100th percentile.

Three-fourths of the data fall below the ________ quartile.

A table that shows the number of observations in each of several nonoverlapping groups is called a ________.

Data and Business Decisions

Probability Concepts and Distributions

Sampling and Estimation

Hypothesis Testing and Statistical Inference

Regression Analysis

Forecasting

Introduction to Statistical Quality Control

Building and Using Decision Models

Decision Models With Uncertainty and Risk

Decisions, uncertainty, and Risk

Queues and Process Simulation Modeling

Linear Optimization

Integer, nonlinear, and Advanced Optimization Methods

Filters

________ is the quartile representing the 50^th percentile.

________ is the quartile representing the 100^th percentile.